package com.xiaolun.netty.protocoltcp;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;

import java.nio.charset.Charset;
import java.util.UUID;


//处理业务的handler-<MessageProtocol>
public class MyServerHandler extends SimpleChannelInboundHandler<MessageProtocol> {
	private int count;

	@Override
	protected void channelRead0(ChannelHandlerContext ctx, MessageProtocol msg) throws Exception {
		//接收到数据，并处理
		int len = msg.getLen();
		byte[] content = msg.getContent();
		System.out.println();
		System.out.println();
		System.out.println();
		System.out.println("服务器接收到信息如下");
		System.out.println("长度=" + len);
		System.out.println("内容=" + new String(content, Charset.forName("utf-8")));
		System.out.println("服务器接收到消息包数量=" + (++this.count));
		//回复消息
		String responseContent = UUID.randomUUID().toString();
		int responseLen = responseContent.getBytes("utf-8").length;
		byte[] responseContent2 = responseContent.getBytes("utf-8");
		//构建一个协议包
		MessageProtocol messageProtocol = new MessageProtocol();
		messageProtocol.setLen(responseLen);
		messageProtocol.setContent(responseContent2);
		ctx.writeAndFlush(messageProtocol);
	}

	@Override
	public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
		ctx.close();
	}
}
